22661977 has 4 divisors (see below), whose sum is σ = 24405220. Its totient is φ = 20918736.

The previous prime is 22661939. The next prime is 22661987. The reversal of 22661977 is 77916622.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 6170256 + 16491721 = 2484^2 + 4061^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22661977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22661917) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 871602 + ... + 871627.

It is an arithmetic number, because the mean of its divisors is an integer number (6101305).

Almost surely, 2^22661977 is an apocalyptic number.

It is an amenable number.

22661977 is a deficient number, since it is larger than the sum of its proper divisors (1743243).

22661977 is a wasteful number, since it uses less digits than its factorization.

22661977 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1743242.

The product of its digits is 63504, while the sum is 40.

The square root of 22661977 is about 4760.4597467051. The cubic root of 22661977 is about 282.9866392324.

The spelling of 22661977 in words is "twenty-two million, six hundred sixty-one thousand, nine hundred seventy-seven".